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	<div id="winchm_template_button"><A href="_ks_libexts.htm" title="Previous topic"><img id="winchm_template_prev" alt="Previous topic" src="../template2/btn_prev_n.gif" border="0"></a><A href="_ks_ohdr.htm" title="Next topic"><img id="winchm_template_next" alt="Next topic" src="../template2/btn_next_n.gif" border="0"></a></div>
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<A href="introduction6.htm">Debugging Tools for Windows (WinDbg, KD, CDB, NTSD)</A> &gt; <A href="debugger_reference.htm">Debugger Reference</A> &gt; <A href="debugger_commands.htm">Debugger Commands</A> &gt; <A href="specialized_extensions.htm">Specialized Extension Commands</A> &gt; <A href="kernel_streaming_extensions__ks_dll_.htm">Kernel Streaming Extensions (Ks.dll)</A> &gt; </div>
	<div id="winchm_template_title">!ks.objhdr</div>
</div>
<div id="winchm_template_container">
	<div id="winchm_template_content"><div id="mainSection"><p>The <b>!ks.objhdr</b> extension displays the kernel streaming object header associated with the specified file object.</p>
<pre class="syntax">
    <b>!ks.objhdr </b><i>FileObject</i><b> </b>[<i>Level</i>]<b> </b>[<i>Flags</i>]  
</pre>
<h2><a id="Parameters"></a><a id="parameters"></a><a id="PARAMETERS"></a>Parameters</h2>
<p></p>
<dl>
<dt><a id="_______FileObject______"></a><a id="_______fileobject______"></a><a id="_______FILEOBJECT______"></a>       <i>FileObject</i>      </dt>
<dd>
<p>This parameter specifies a pointer to a WDM file object. If <i>FileObject</i> is not valid, the command returns an error.</p>
</dd>
<dt><a id="_______Level______"></a><a id="_______level______"></a><a id="_______LEVEL______"></a>       <i>Level</i>      </dt>
<dd>
<p>Optional. Values are the same as those for <a href="#Bookmark2710"><b>!ks.dump</b></a>. </p>
</dd>
<dt><a id="_______Flags______"></a><a id="_______flags______"></a><a id="_______FLAGS______"></a>       <i>Flags</i>      </dt>
<dd>
<p>Optional. Values are the same as those for <a href="#Bookmark2710"><b>!ks.dump</b></a>. </p>
</dd>
</dl>
<h3><a id="DLL"></a><a id="dll"></a>DLL</h3>
<table>
<tr>
<td>
<p><b>
          Windows 2000</b></p>
</td>
<td>
<p>
          winxp\Ks.dll 
         </p>
</td>
</tr>
<tr>
<td>
<p><b>Windows XP and later
         </b></p>
</td>
<td>
<p>
          Ks.dll
         </p>
</td>
</tr>
</table>
<p> </p>
<h3><a id="Additional_Information"></a><a id="additional_information"></a><a id="ADDITIONAL_INFORMATION"></a>Additional Information</h3>
<p>For more information, see <a href="#Bookmark1462">Kernel Streaming Debugging</a>.</p>
<h2>Remarks</h2>
<p>Levels and flags for <b>!ks.objhdr</b> are identical to those described in <a href="#Bookmark2710"><b>!ks.dump</b></a>.</p>
<p>The output from <a href="#Bookmark2706"><b>!ks.allstreams</b></a> and <a href="#Bookmark2715"><b>!ks.enumdevobj</b></a> can be used as the input for <b>!ks.objhdr</b>. To do this with the <i>avssamp</i> sample, for instance, issue the following commands:</p>
<div class="code"><span codelanguage=""><table>
<tr>
<th></th>
</tr>
<tr>
<td>
<pre>kd&gt; !ks.allstreams
6 Kernel Streaming FDOs found:
    Functional Device 8299be18 [\Driver\smwdm]
    Functional Device 827c86d8 [\Driver\wdmaud]
    Functional Device 827c0f08 [\Driver\sysaudio]
    Functional Device 82424590 [\Driver\avssamp]
    Functional Device 82423720 [\Driver\MSPQM]
    Functional Device 82b91a88 [\Driver\MSPCLOCK]
kd&gt; !ks.enumdevobj 82424590
WDM device object 82424590:
    Corresponding KSDEVICE        82427540
    Factory 8285baa4 [Descriptor f7a333c8] instances:
        82837a34 
kd&gt; !ks.objhdr 82837a34 7</pre>
</td>
</tr>
</table></span></div>
<p>The results of this command might be lengthy. Issue a Ctrl-BREAK (WinDbg) or Ctrl-C (NTSD, CDB, KD) to stop the output.</p>
<p>Here's a separate example:</p>
<div class="code"><span codelanguage=""><table>
<tr>
<th></th>
</tr>
<tr>
<td>
<pre>kd&gt; !ks.objhdr 81D828B8 7
Adjusting file object 81D828B8 to object header 81BC1008

Object Header 81BC1008
    Associated Create Items:
        Create Item F9F77E98
            CreateFunction = ks!CKsFilter::DispatchCreatePin+0x00
            ObjectClass = {146F1A80-4791-11D0-A5D6-28DB04C10000}
            Flags = 0
    Child Create Handler List:
        Create Item F9F85AA0
            CreateFunction = ks!CKsPin::DispatchCreateAllocator+0x00
            ObjectClass = {642F5D00-4791-11D0-A5D6-28DB04C10000}
            Flags = 0
        Create Item F9F85AB8
            CreateFunction = ks!CKsPin::DispatchCreateClock+0x00
            ObjectClass = {53172480-4791-11D0-A5D6-28DB04C10000}
            Flags = 0
        Create Item F9F85AD0
            CreateFunction = ks!CKsPin::DispatchCreateNode+0x00
            ObjectClass = {0621061A-EE75-11D0-B915-00A0C9223196}
            Flags = 0
    DispatchTable:
        Dispatch Table F9F85AE8
            DeviceIoControl = ks!CKsPin::DispatchDeviceIoControl+0x00
            Read = ks!KsDispatchInvalidDeviceRequest+0x00
            Write = ks!KsDispatchInvalidDeviceRequest+0x00
            Flush = ks!KsDispatchInvalidDeviceRequest+0x00
            Close = ks!CKsPin::DispatchClose+0x00
            QuerySecurity = ks!KsDispatchQuerySecurity+0x00
            SetSecurity = ks!KsDispatchSetSecurity+0x00
            FastDeviceIoControl = ks!KsDispatchFastIoDeviceControlFailure+0x00
            FastRead = ks!KsDispatchFastReadFailure+0x00
            FastWrite = ks!KsDispatchFastReadFailure+0x00
    TargetState: KSTARGET_STATE_ENABLED
    TargetDevice: 00000000
    BaseDevice  : 81BBDF10
    Stack Depth : 1
    Corresponding AVStream object = 81A971B0</pre></td></tr></table></span></div></div></div>	
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